how to connect bluetooth headset to non bluetooth tv(hdtv)

Add a bluetooth transmitter to the TV. You will need one that has the correct input to match the audio output type on your TV, Optical is most common.
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If you have a headphone or analog audio out you can use any BT transmitter. The headphone out will cut off the TV speakers so you can't use both headphones and TV speakers at the same time.
 
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